Dark Spots On Garage Floor Concrete

We have dark spots that get lighter and darker but never 100 go away.

Dark spots on garage floor concrete. I m wondering why my concrete garage slab ended up blotched and discolored. To complicate the color issue the trend to go green and use recycled products as partial cement replacements can produce color variations depending on the percentage of recycled material put into the mix the water to cementitious materials ratio and how the concrete is cured. I live mid block houses on both sides in a 1906 city row house with brick basement walls and a cement floor. Walls floors ceilings including un wanted stains from various causes deliberate concrete coloring processes stains or acid treatments.

In fact you also mentioned that the spots seem to be getting larger over time. The contractor poured two slabs on a day with a high temperature of 53 degrees and a low of 48. Concrete discoloration dark spots stripes and blotchy concrete. Discoloration issues on new concrete.

Concrete discoloration comes in the form of dark spots stripes blotchy areas and color differences. The finisher used 2 percent calcium for the slab that ended up discolored. Methos for removing un wanted discoloration or stains from concrete. This article provides a catalog of types of stains found on concrete surfaces.

Stains colors or discoloration on concrete surfaces. Water beneath the slab could turn the concrete a dark color as it would when water is spilled or poured on the surface.